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https://issues.apache.org/jira/browse/AMBARI-18930?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alejandro Fernandez updated AMBARI-18930:
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Attachment: AMBARI-19830.patch
> Ambari thinks a component is installed, even if the install is partially done
> -----------------------------------------------------------------------------
>
> Key: AMBARI-18930
> URL: https://issues.apache.org/jira/browse/AMBARI-18930
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.4.2
> Reporter: Zsombor Gegesy
> Attachments: AMBARI-19830.patch
>
>
> We have lot's of deployment problems which ends up in a state, where Ambari
> thinks a component is installed, but when it tries to start it, the component
> fails to start up, because missing kerberos keytabs.
> The investigation found the following scenario :
> * blueprint install
> * For the datanode to install it's needs the following steps:
> ** install the datanode package on host A
> ** generate keytab(s) on server
> ** set up datanode-keytab on host A
> * In the "Install components on host ...." step the following steps are
> scheduled :
> ** package install
> ** (other package install)
> ** keytab setup
> * If there was an error in the 'other package install', then the kerberos key
> generation, and host setup is skipped.
> * But Ambari thinks, this component is installed - because the package
> install step succeeded.
> * However, when/if someone tries to start the component, it fails with the
> missing keytabs
> * The only way to fix this is to manually "Delete" and "Reinstall" the
> component, which doesn't make the best impression on the user.
> Proposed ideas to fix :
> * re-order the install steps - first generate the keytabs on the server,
> distribute to the host, and later install the package. This would ensure,
> when the package is installed on a host, it's keytabs are there as well.
> * mark the partially installed component as 'install failed' on the UI - so
> the user could try to re-install, when they see it.
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